/**
     * 获取加购产品
     * @param int $pageSize
     * @param int $pageNumber
     * @return string
     * @throws \Magento\Framework\Exception\LocalizedException
     */
    function get($pageSize, $pageNumber)
    {
        $products = $this->product->getResourceCollection()->addAttributeToSelect(InstallData::purchase_FLAG_ATTR, 1)->setPageSize($pageSize)->setCurPage($pageNumber)->getData();
        return $this->success('请求成功！',$products,'addPurchaseProductGetOK');
    }